Stock-based compensation - Summarized Activity Related to Restricted Stock Units (Detail) - Restricted Stock Unit shares in Thousands	3 Months Ended
	Jan. 31, 2023 $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	81
Granted (in shares) | shares	36
Forfeited (in shares) | shares	(2)
Vested (in shares) | shares	(42)
Ending balance (in shares) | shares	73
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 223,770
Granted (in dollars per share) | $ / shares	237.68
Forfeited (in dollars per share) | $ / shares	242.02
Vested (in dollars per share) | $ / shares	218.85
Ending balance (in dollars per share) | $ / shares	$ 233.00